{"kind":"host","input":"mail.cra.cz","report":{"host":"mail.cra.cz","checkedAt":"2026-11-07T02:58:49.506Z","a":{"status":"found","values":["82.99.159.42"],"ttl":3600,"via":"Cloudflare","cname":[]},"aaaa":{"status":"found","values":["2a02:a40:200:3955::42"],"ttl":3600,"via":"Cloudflare","cname":[]},"verdict":"dual-stack"},"readiness":{"grade":"A","summary":"Website, mail and DNS all work over IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"mail.cra.cz has an AAAA record and answers on it.","addresses":[{"address":"2a02:a40:200:3955::42","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"pass","detail":"No MX records, so mail goes to the domain's own address (implicit MX). It has an AAAA record."},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"3 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"ns.bluetone.cz","ipv6":true},{"host":"ns1.bluetone.cz","ipv6":true},{"host":"ns2.bluetone.cz","ipv6":true}]}]},"https":{"status":"pass","summary":"Loads over IPv6 with a valid certificate after 1 redirect: HTTP 440.","hops":[{"url":"https://mail.cra.cz/","address":"2a02:a40:200:3955::42","status":303,"tls":"valid"},{"url":"https://mail.cra.cz/owa","address":"2a02:a40:200:3955::42","status":440,"tls":"valid"}]},"receiptId":"qIMH5xoNco","reused":true,"measuredAt":"2026-11-07T02:58:50.447Z"}